public PageDifferenceView GetPageDifference(int id)
{
var version = GetAllPagesQuery().FirstOrDefault(x => x.Id == id);
if (version == null)
{
throw new PageNotFoundException("Failed to find the page with that version ID.");
}
if (IsGuestRequest && (version.ApprovalStatus != ApprovalStatus.Approved || !version.IsPublished))
{
throw new PageNotFoundException("Failed to find the page with that version ID.");
}
var versions = IsGuestRequest
? version.Page.Versions.Where(x => x.IsPublished && x.ApprovalStatus == ApprovalStatus.Approved)
: version.Page.Versions;
var previous = versions
.Where(x => x.Id < version.Id)
.OrderByDescending(x => x.Id)
.FirstOrDefault();
var response = new PageDifferenceView
{
Id = version.PageId,
LastModified = DateTime.UtcNow.Subtract(version.ModifiedOn).ToTimeAgo(),
CreatedBy = version.CreatedBy.DisplayName
};
if (previous == null)
{
response.Html = Converter.ToHtml(version.Text);
response.Title = version.Title;
response.TitleForLink = PageView.ConvertTitleForLink(version.Title);
response.Tags = string.Join(", ", PageVersion.SplitTags(version.Tags));
}
else
{
response.Html = HtmlDiff.Process(Converter.ToHtml(previous.Text), Converter.ToHtml(version.Text));
response.Title = HtmlDiff.Process(Converter.ToHtml(previous.Title), Converter.ToHtml(version.Title));
response.TitleForLink = PageView.ConvertTitleForLink(previous.Title);
response.Tags = HtmlDiff.Process(Converter.ToHtml(string.Join(", ", PageVersion.SplitTags(previous.Tags))), Converter.ToHtml(string.Join(", ", PageVersion.SplitTags(version.Tags))));
}
return(response);
}